Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet

Details Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.5212r&link_type=abstract

American Astronomical Society Meeting 205, #52.12; Bulletin of the American Astronomical Society, Vol. 36, p.1424

Astronomy and Astrophysics

Astronomy

Scientific paper

Oxygen abundances for a large sample of dwarf stars in the Galactic thin and thick disks are determined from a non-LTE analysis of the oxygen triplet lines at 777 nm. Kinematic criteria are employed to determine whether a star belongs to the thin or thick disk. Temperatures are obtained from photometric calibrations based on the infrared flux method and surface gravities from Hipparcos parallaxes and stellar evolution calculations. High resolution spectra from the HET and the 2.7 m telescopes at McDonald Observatory, and the VLTI-UVES archive are used. Metallicities are derived from relatively unblended Fe I and Fe II lines for which reliable laboratory gf values are available. Oxygen abundances are obtained from the triplet lines at 777 nm and a restricted non-LTE analysis, i.e. spectrum synthesis was performed with non-LTE level populations on an LTE atmospheric structure. We confirm previous studies that suggest higher oxygen abundances in the thick disk than in the thin disk although our preliminary results favor a smooth transition instead of two completely separate trends, i.e. thick disk stars with intermediate and relatively lower oxygen abundances are also found.

Affiliated with

Also associated with

No associations

Rating

Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen In The Galactic Disk: Non-LTE Abundances From The 777 nm O I Triplet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1638340